# iDOS 3 vs Secure Zip & Unzip

The clearest difference is price: iDOS 3 at $4.99 against Secure Zip & Unzip's $12.99. iDOS 3 also leads on chart position (#128 vs unranked) and update cadence (every 6 weeks vs every 3 months). Secure Zip & Unzip's advantage is review sentiment (100% vs 70%). On ads, in-app purchases and device support there is nothing between them.

iDOS 3 costs $4.99 and Secure Zip & Unzip $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iDOS 3 ships an update every 6 weeks, Secure Zip & Unzip every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | iDOS 3 | Secure Zip & Unzip |
| --- | --- | --- |
| Price | **$4.99** | $12.99 |
| Rating | **[4.3 (52 ratings)](https://appshunter.io/ios/app/idos-3/id1580768213/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 69.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#128** | — |
| Size | 8 MB | 9 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [潮激 李](https://appshunter.io/developer/342075158) | [ALPER KAPLAN](https://appshunter.io/developer/1801852243) |

## What reviewers say

### iDOS 3

[App page](https://appshunter.io/ios/app/idos-3/id1580768213)

**Currently charting:** #128 Top Paid · Utilities (US App Store)

Experience classic DOS games and applications on your iPhone and iPad. This app emulates a DOS PC, offering modern controls for enhanced playability. It also supports productivity tasks like word processing and programming.

**Highlights:** On-screen keyboard with custom layouts, Virtual gamepad with customizable bindings, Trackpad mouse emulation, MT-32 emulation and MIDI support, Bluetooth keyboard and gamepad support, Bluetooth mouse support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎮 Playable classic DOS games
- 🤖 Great DOS emulator functionality
- 🎨 Awesome interface and user experience
- 🔍 Supports mounting of various disk formats (floppies, ISOs)
- 🖥️ Works best on M1/M2/M4 iPads

**What reviewers complain about**

- 🕹️ Steep learning curve for casual users
- 🔧 Lacks support for some common disk formats (e.g. .img, .iso)
- 🎮 Issues with game controls and mapping
- 📁 Difficulty managing multiple floppy disk installers
- 🔍 Limited disk mounting options in landscape mode


### Secure Zip & Unzip

[App page](https://appshunter.io/ios/app/secure-zip-and-unzip/id6743336321)

Create and open password-protected ZIP archives with strong AES-256 encryption. This utility encrypts and decrypts files entirely on your device, ensuring your data remains private and accessible across various platforms. Seamlessly integrate with other apps to protect files before sharing.

**Highlights:** AES-256 encryption, Password protection for ZIP archives, On-device encryption and decryption, Cross-platform compatibility, Integration with other apps, Native iOS and iPadOS design

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is iDOS 3 free?

iDOS 3 costs $4.99, with no in-app purchases.

### Is Secure Zip & Unzip free?

Secure Zip & Unzip costs $12.99, with no in-app purchases.

### Do iDOS 3 or Secure Zip & Unzip have ads?

Neither iDOS 3 nor Secure Zip & Unzip shows ads.

### Which is updated more often, iDOS 3 or Secure Zip & Unzip?

iDOS 3 ships an update every 6 weeks, and Secure Zip & Unzip every 3 months. Most recently, iDOS 3 was updated on November 3, 2026 and Secure Zip & Unzip on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*